On Sat, 2003-12-13 at 22:10, Stuart Bishop wrote:
> Until following the steps in doc/INSTALL.txt fires up a single ZEO
> server bound to the loopback address and a single ZEO client (with
> authentication on), the vast majority of developer and production
> installations will be ZEO-less. This also makes ZEO-less installations
> the best tested and most stable environment, or at least people will
> assume so.
Can't argue about the assumptions, nor about how people are likely to
start off using Zope; nevertheless, *every* ZC developer routinely uses
ZEO, even for sandbox development. None of us would even contemplate
*not* using ZEO in production: its "testedness" is pretty well
established.
Here are a couple of compelling reasons to run with ZEO all the time:
- You can't scale Zope across hardware without ZEO, which means you
need to assume that you will (or at least may) need it in
production; hence, you might as well develop and test your app /
site with ZEO.
- ZEO lets you get a debug session open on your database without
stopping the live site (this can be a lifesaver, particularly in
development and site configuration; ever lock yourself out of the
site by messing up the configuration of your root user folder?)
- ZEO speeds restarts, often dramatically (verifying persistent caches
used to be problematic, but ZODB3 3.2 has a fix for the common
case).
- ZEO makes ZODB-dependent unit tests run faster (another facet of
the restart problem). This has been particulary true for testing
products installed in INSTANCE_HOME, because the machinery for
stitching together the __path__ of Products was tightly coupled to
appserver startup. We might be able to fix that in future Zopes.
Tres.
--
===============================================================
Tres Seaver [EMAIL PROTECTED]
Zope Corporation "Zope Dealers" http://www.zope.com
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